Stone slab mounting

Abstract

A mechanical mounting is disclosed to mount thin stone slabs as the facade of buildings in which a bolt hole and a pin hole are drilled into the rear surface of the slab to intersect and with the pin hole to pass through the bolt hole and end in the slab therepast. A pin in the pin hole extends through a first bolt in the bolt hole with the pin coupled to the first bolt and extending in the pin hole into the slab on either side of the bolt hole. The pin extends rearwardly out of the slab to be coupled to a second bolt. The first and second bolt members are coupled to a support frame and form with the pin a rigid truss to assist in bearing the weight of the slab without deformation of the first bolt.

What I claim is: 
     
       1. A wall assembly wherein a facing slab is mounted to a support structure, said slab having a rear surface, the improvement comprising: a first bore extending into the slab from the rear surface and ending at a first blind end,   a second bore extending into the slab from the rear surface to intersect the first bore, through the first bore, and into the slab beyond the first bore where the second bore ends at a second blind end,   first elongate bolt means having a front portion in the first bore and a rear portion which extends rearwardly from the rear surface of the slab,   a threaded first aperture through the first bolt means coaxially aligned with the second bore,   threaded elongate pin means having a front portion in the second bore and a rear portion which extends rearwardly from the rear surface of the slab,   the front portion of the pin means disposed in the second bore in threaded engagement within the first aperture of the first bolt means and passing through the first bore at least partially into that segment of the second bore in the slab beyond the first bore,   second elongate bolt means having a front portion and a rear portion with the rear portion carrying first means for coupling to the support structure,   the rear portion of one of the pin means and the first bolt means coupled to the front portion of the second bolt means,   the rear portion of the other of the pin means and the first bolt means carrying second means for coupling to the support structure, and   the first and second bolt means and the pin means forming a rigid truss with the support structure to support and anchor the slab.   
     
     
       2. A wall assembly as claimed in claim 1 wherein the rear portion of the second bolt means being disposed parallel to the rear portion of the other of the pin means and the first bolt means, and the first and second means for coupling to the support structure providing for movement of the second bolt means and the one of the pin means and first bolt means in a direction parallel to that in which the rear portion of the second bolt means is disposed and providing for adjustable locking at different positions.   
     
     
       3. A wall assembly as claimed in claim 2 wherein said one of the pin means and first bolt means comprises the pin means. 
     
     
       4. A wall assembly as claimed in claim 3 wherein said front portion of the second bolt means has a threaded second aperture, the rear end of the pin means is in threaded engagement within the second aperture.   
     
     
       5. A wall assembly as claimed in claim 4 wherein said pin means and the first and second bolt means each comprises an elongate cylindrical rod about a longitudinal axis, with the longitudinal axis of each of the first and second bolt means parallel. 
     
     
       6. A wall assembly as claimed as in claim 5 wherein said rear portion of the first and second bolt means are threaded, said first and second coupling means comprising pairs of threaded nut means threaded onto each of the first and second bolt means.   
     
     
       7. The wall assembly as claimed in claim 6 including plate-like beam means on the support structure with front and rear surfaces normal to the axis of the first and second bolt means and apertures through the beam means through which respective of the first and second bolt means extend for locking thereto by said nut means threaded onto the bolt means on either side of the beam means. 
     
     
       8. The wall assembly as claimed in claim 7 wherein one of the nut means threaded onto the first and second bolt means between the beam means and the slab has a slot in its rearward axial surface facing the beam means, the apertures through the beam means through which the first and second bolt means extend providing an annular space about each of the first and second bolt means of a sufficient size to permit access to the slot from the rearward side of the beam means for adjustment of location of each of the first and second bolt means relative to the beam means from the rearward side of the beam means.   
     
     
       9. An assembly as claimed in claim 1 wherein said slab comprises a slab of marble, granite or pre-cast concrete. 
     
     
       10. An assembly as claimed in claim 8 wherein voids within said first and second bore means are filled with waterproof filler means. 
     
     
       11. A wall assembly as claimed in claim 1 wherein said front portion of the second bolt means has a threaded second aperture, the rear end of the pin means is in threaded engagement within the second aperture.   
     
     
       12. A supporting and anchoring system for a building facing slab comprising a slab having a rear surface,   a bolt hole extending into the slab from the rear surface and ending at a first blind end,   a pin hole extending into the slab from the rear surface to the bolt hole, through the bolt hole and into the slab beyond the bolt hole where the pin hole ends at a second blind end,   a first elongate cylindrical bolt member having a front portion in the bolt hole and a threaded rear portion which extends rearwardly from the rear surface of the slab,   a threaded aperture through the first bolt member coaxially aligned with the pin hole,   an elongate, threaded cylindrical pin member having a front end in the pin hole and a rear portion which extends rearwardly from the rear surface of the slab,   the front portion of the pin means being in threaded engagement within the aperture of the first bolt member and passing through the aperture of the first bolt member into a segment of the pin hole in the slab beyond the first bolt member,   a second elongate cylindrical bolt member having a front portion and a threaded rear portion,   a threaded aperture through the front portion of the second bolt member,   the second portion of the pin member in threaded engagement within the aperture through the second bolt member,   first coupling means to couple the rear portion of the first bolt member to a support structure and second coupling means to couple the rear portion of the second bolt member to the support structure wherein by coupling said first and second bolt members to the support structure, the first and second bolt members and the pin members form a rigid truss.   
     
     
       13. A system as claimed in claim 12 wherein the axis of these first and second bolt members are parallel and the axis of the pin member intersects with the axes of the first and second bolt members. 
     
     
       14. A system as claimed in claim 13 wherein the axis of the pin member forms an angle of between about 30° to 60° with the axis of each of the first and second bolt members. 
     
     
       15. A system as claimed in claim 14 wherein the first and second bolt members are substantially perpendicular to the rear surface of the slab. 
     
     
       16. A system as claimed in claim 15 wherein the axis of the pin member forms an angle of about 45° with the axis of the first and second bolt members. 
     
     
       17. A system as claimed in claim 13 further comprising thin plate-like beam means fixably attached to the support structure, apertures through the beam means with first and second bolt members extending through the apertures through the beam means, the first and second coupling means comprising, on each of the first and second bolt members, threaded nut members which compress the beam means therebetween,   the first and second bolt members being disposed normal to surfaces of the beam means.   
     
     
       18. A system as claimed in claim 12 wherein said slab comprises a slab of marble, granite or pre-cast concrete.